Just because the end of the story has to be the last 3 paragraphs of the story doesn’t mean that they have to be the last 3 paragraphs of the story. Some stories put the end of the story on the first page. This results in the author giving away some important events and main characters to look for throughout the book. Those names stay in our minds, and when we read a story like that, we look for the names mentioned on the first page of the book. Authors who use this strategy well leave out one important part of the story–the how part. How does this happen? The ending of a story is usually the last 3 paragraphs of the story, but some people decide to put it on the first page.
Don’t do what everyone else does if you disagree with it.